package com.hk.intercept;


import com.hk.constant.JwtConstant;
import com.hk.context.BaseContext;
import com.hk.model.pojo.Employee;
import com.hk.properties.JwtProperties;
import com.hk.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenAdminInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    /**
     * 校验jwt
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }
        //1、从请求头中获取令牌
        String token = request.getHeader(JwtConstant.TOKEN_NAME);
        //2、校验令牌
        try {

            //todo : jwt校验出错, 后续完善
//            Claims claims = JwtUtil.parseJWT(token);
//            String username =  (String) claims.get(JwtConstant.USER_INFO);
//            log.info("当前后台员工账号：{}", username);
            //获取当前线程
            BaseContext.setCurrentId("admin");

            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            log.info("jwt校验失败：{}", ex.getMessage());
            response.setStatus(401);
            return false;
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        BaseContext.removeCurrentId();
    }
}